Yara CheckIT is an agriculture mobile app that gives farmers a photographic library of crops to allow a simple and fast identification of possible nutrient deficiencies.

Users can reference photos of deficiencies in high definition, filter them by symptoms, the location of the symptom on the crop, or by the suspected cause of the symptom. Once the cause of the deficiency is established, the app gives further information on how the deficiency affects that crop, what soil types are prone to this type of deficiency and what factors will make a deficiency worse. CheckIT provides a fertilizer recommendation to treat the identified nutrient deficiency, as well as alternative products which allow preventive treatment for the following growing season.

The application is customized and localized for the crops and language specific to the target country. CheckIT has been carefully designed to operate in rural locations with low signal strength. This enables farmers to have an on-the-spot, on-demand field analysis and recommendation for a crop deficiency, to help them improve crop quality and increase yield. CheckIT can also use mobile location services to provide contact information for the nearest Yara office.
The Yara CheckIT app is available for download in selected countries on iOS, Android and Windows Mobile.

(Source- http://www.yara.com/media/apps/checkit/)